Automatic damper-operating device.



MLLER. AUTOMATIC DAMPER OPERATING DEVICE.v

APPLIIOTION FILED PEBJI, 1909.

Paten-ted Dec.28,19()9.

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P. H. MLLER. AUTOMATIC DAMPER OPERATING DEVICE. APPLIOATION FILED 33.11,1909.

944,808. Patented 1360.28, 1909. i

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WIT NESSES Arm/mf ys Y FREDERICK I-I. MLLER, OF LANSDALE, PENNSYLVANIA.

AUTOMATIC DAMPER-OPERATING DEVICE.

Specification of Letters Patent.

Patented Dec. 28, 1909.

Application filed February 11, 1909. Serial No. 477,276.

To all whom it may concern.'

Be it known that I, FREDERICK H. ML- LER, a citizen of the UnitedStates, and a resident of Lansdale, in the county of Montgomery andState of Pennsylvania, have invented a new and Improved AutomaticDamper-Operating Device, of which the following is a full, clear, andexact description.

The purpose of this invention is to provide novel means forsimultaneously operating the dampers of a cooking stove or range at apredetermined time, so as to start a smoldering fire therein into freeburning condition; a further object being to provide means for soundingan alarm at the same time the dampers in the range are adjusted toproduce free draft therein.

The invention consists in the novel construction and combination ofparts, as is hereinafter described and defined in the appended claims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure l presents a perspective view of the improved damper operatingdevice in position on a range, shown in perspective by dotted lines andviewed from the front; Fig. 2 is an end view of the range shown indotted lines, and a side view of the improvement shown by full lines inoperative position on the range; and Fig. 3 is a rear view of the rangeand a front view of the damper-operating mechanism, parts of the rangethat are on the opposite face of the range appearing in dotted lines.

The improvement may be applied to cooking stoves and ranges that varysomewhat in structure; as an example of the application, it isrepresented in operative position on a modern cooking range, that willbe briefly described to render clear the relative position of parts ofsaid range that are actuated by details of the invention.

A indicates the body of a range of well known construction, having anash-pit door B on its front, that is closed except when it is opened toquicken the draft. A lower draft damper C is slidably mounted above ahearth plate D at one end of the range, and just below the top plate Eanother damper F is slidably secured in the usual manner, an

open adjustment of the damper F being made when the lire in the range isdamped, but an opened condition of the damper C causes the fire to burnbriskly. Another damper G is slidably held in the draft pipe II of therange, which damper is opened when draft in said pipe is to be reduced,or when the lire in the range is dampened to keep it alive during thenight.

The invention, briefly described, consists in the employment of apendent weight, connected with a plurality of flexible wires that extendto and are attached upon the dampers that are to be opened or closed,the weight being supported in the bight of one of the wires, that iswrapped upon a grooved pulley controlled by a ratchet wheel and pawl,whereby the wire is prevented from unwrapping until the pawl is detachedfrom the teeth of the ratchet wheel.

An ordinary alarm clock is so connected with the pawl engaged with theratchet wheel, that when said alarm is released at a predetermined time,as indicated on t-he clock, the pawl will be detached from the ratchetwheel and the weight will descend and pull upon the wires, so as toadjust the dampers for producing a strong draft.

Referring to the drawings, 5 indicates a bracket-shelf, preferablysecured on the rear wall of the range body, and on which an alarm clock6 is seated and secured. On the back wall 5a of said shelf a groovedpulley a is pivoted, having one of its flanges peripherally toothed, asis best shown in Fig. 2. On the back wall 51 of the bracketshelf 5,adjacent tov the grooved pulley c, a pawl Z) is pivoted, and normallyengages between the teeth on the toothed flange of said pulley.

From the pawl b a wire b is extended toward and connected with the usualtrip in the alarm clock that sets it to striking, the wire receiving asuiiicient pull therefrom to detach the toe of the pawl from the ratchetteeth.

A flexible wire S is secured by one end on the pulley a and wrapped oneor more turns thereon, and depends from the pulley in a bight c. Aweight 7 of proper intensity is loosely engaged with the bight of thewire S, and from the bight of the wire the latter is extended upward andpassed through a perforation in the upright portion I of a shelf that isextended from the back wall of the range and rests onV a small pulley(Z.

From the pulley Z the wire S is laterally extended to a ring-eye orgrooved pulley 7', and thence upward to another ring-eye or groovedpulley g, and thence to the end of the slidable damper G, that isnormally closed to insure draft in the pipe H, but when the fire in therange is damped said damper is opened so as to check the combustion offuel.

From the horizontal portion of the wire 8 that extends between thepulleys CZ and f, a short wire 8a is downwardly extended and attached atits lower end upon a hinged damper J, which is within the upper portionofthe stove or range, and controls the flow of products of combustionfrom fuel to the draft pipe H, and it will be seen that a pull on thewire 8 will relax the branch wire 8a, which will permit the hingeddamper J to fall and open the draft passage into the pipe H.

The ash pit door B, at the front side of the range, is so hinged that ifthe catch thereon is raised slightly, said door will swing open due toits gravity, and the usual means for releasing the catch of said door isin the form of an angle lever K, that is pivoted at its angle on abracket stand L, so that by foot pressure one limb of the angle levermay be depressed and thus rock the other limb thereof into engagementwith the door catch, thereby releasing the door and affording free draftto the fire that is above the ash-pit.

From the wire S at a point between the bight c and pulley al, a wire Slis extended through a ring eye 7L on the rear wall of the range body,and thence downward into a loose engagement with a small pulley i or thelike at the bottom of said rear wall, and from said pulley the wire 8bis extended forwardly over two small pulleys 7c". From the pulley 7cthere is a short end portion of the wire S" extended upward and attachedto the lower member of the angle lever K. It will be seen that thedescent of the weight 7 will pull on the branch wire 8b and rock thelever K, which will trip the catch of the door B so that by its gravityit will swing open and afford draft to the range fire.

From the horizontal portion of the wire 8b that extends across the rangefrom the rear to the front, there is an upward extension 8 which passesover a pulley 7.12 and trends to the height of the damper F, and passinglaterally over a small pulley Z is attached by its end on an adjacentend of the top damper F, as is clearly shown in Fig. 2. Between thelower and upper pulleys 7c and Z, a wire branch 8d extends laterallyfrom the upright wire SC over a pulley m and at the extended end thereofis secured upon the forward end of the lower damper C, so that thedescent of the weight 7 which will pull upon the flexible connections 8cand 8d will close the upper damper F and open the lower damper C.

It will be noted that the release of the weight 7 by the action of thealarm clock G will put such tension on the wires 8, 8, 8 and SC, 8dAthat the door B and dampers C, F, Gr and J will all be properlyadjusted to give full draft for the fire in the range at an instant oftime that the alarm mechanism of the clock 6 is released, and in turnreleases the pawl Z) from the ratchet wheel on the grooved pulley a, sothat the range will become hot in a short time.

To notify the person concerned that the range fire is under full draft,an alarm bell M is placed in the bedroom of said person, and wires N arethence extended to a switch O that is secured on the range directlybelow the weight 7, a battery P being introduced in the circuit wires N.When the weight is released for descent, as before explained, it will byits contact with the push button on the switch O close the circuit andring the bell M. A switch R may also be placed in the circuit byconnection with the wires N, so that upon awakening the person, it maybe adjusted to open the circuit and stop the bell from ringing.

Having thus described my invention, I 9 claim as new and desire tosecure by Letters Patent:

1. The combination with a stove or range, and dampers thereon, of agrooved pulley having a ratchet-toothed flange, a pawl en- 100 gagingthe teeth of said flange, a wire secured on said pulley, a weight hungfrom a bight on said wire, a plurality of wires connected to the firstmentioned wire and to the dampers, an alarm clock having a trip, and am5 wire connecting the said pawl and the trip of the alarm clock torelease the pawl and permit the weight to descend and pull on the wiresat a predetermined time.

2. The combination with a stove or range '1,10 and dampers thereon, of aybracket shelf secured on the rear wall of the range body, a groovedpulley pivoted on the back wall of the bracket shelf and having one ofits flanges peripherally toothed, a pawl pivoted 115 on the back wall ofthe bracket shelf adjacent to the pulley and normally engaging betweenthe teeth of said flange, a flexible wire secured at one end on thepulley and depending from the pulley in a bight, a weight looselyengaged with the bight of the wire, a plurality of wires connected withthe first mentioned wire and with the dampers, an alarm clock secured onsaid bracket shelf, a trip for said clock, and a flexible connectionbetween the said pawl and the trip of said clock to release the pawl ata predetermined time to permit the weight to descend and pull on saidwires.

8. A damper adjust-ing mechanism com- 13( prising a plurality of wiresor the like respectively connected to the dampers, a weight connectedwith the wires for moving the same to actuate the dampers, means forsupporting the weight, means for releasing said supporting means at a`predetermined time to permit the weight to descend, an electric circuitincluding a bell, and a push button adapted to be engaged by the saidweight to close the circuit.

a. A damper adjusting mechanism of the character described, comprising aplurality of wires or the like respectively connected to the dampers, a.weight hung on one of the wires, a ratchet device that supports theweight, an alarm clock adapted for releasing the ratchet device so as topermit the weight to descend at a predetermined time, a push button andswitch controlled thereby that may be pushed by the descendingweight, abattery, a bell, and open circuit wires connecting the bell with theswitch, the circuit being closed when the weight seats upon the pushbutton.

A damper adjusting mechanism, comprising an alarm clock, a weightconnected with the dampers and controlled by the alarm clock foractuating the dampers at a predetermined time, an electric circuit, analarm, and a push button in said circuit, the said push button beinglocated directly below said weight and adapted to be engaged andactuated thereby.

G. In a damper adjusting mechanism, flexible means connected with thedampers, an alarm clock, a movable device controlled by said alarm clockfor effecting a pull on said flexible means to actuate the dampers at apredetermined time, an electric circuit, an alarm in said circuit, and acircuit closer located in the path of said movable device and adapted tobe directly engaged and actuated by said device.

7 The combination with a stove or range and dampers thereon, of aWeight, flexible connections between the weight and said dampers, thesaid weight when free to descend being arranged to pull on saidconnections to actuate the dampers, means for releasing the said weightat a predetermined time, an electric circuit, an alarm in said circuit,and circuit closing means located beneath said weight, and actuateddirectly by said weight when the latter is released.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FREDERICK H. MLLER.

Witnesses A J. URHUST HARVEY, A. R. PLACE.

